Abstract: depths in the waters of Southern Baikal in the summer–autumn period, obtained using both free-floating buoys and moored buoy stations. Processing the field data and presenting them as isotherms allows one to identify intense internal waves propagating in the near-surface thermally stratified layer. Particular attention was paid to large-amplitude waves that affect vertical mixing processes in the water column. For mathematical modeling of large-amplitude internal waves, we used nonlinear multilayer long-wave equations in the Boussinesq approximation. This model takes into account the fine structure of stratification in the pycnocline region, velocity shear and non-hydrostatic pressure distribution in the upper and/or lower layers. We constructed quasi-periodic solutions in the class of traveling waves and demonstrate the influence of the velocity shear in layers on the profile of a solitary wave. We compared the observed large-amplitude waves with the corresponding traveling-wave solutions obtained within the model. This comparison allowed us to both validate the model and understand what other field data are primarily needed for correct modeling of internal waves in Southern Baikal.

Cite: Aslamov I. , Chesnokov A. , Ermishina V. , Liapidevskii V.
Internal waves in a thermally stratified lake: Modeling and field observations in Southern Baikal
Journal of Great Lakes Research. 2026. 102915 . DOI: 10.1016/j.jglr.2026.102915 Scopus OpenAlex

Dates:

Published online:

Aug 11, 2026

Identifiers:

≡ Scopus:	2-s2.0-105046889011
≡ OpenAlex:	W7202199296

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